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Compare the standard deviation for the heights of males which 4.21 and the standard deviation for the heights of females which is 2.50 in the class. Compare the values and explain what can be concluded based on the numbers.
If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds?
What is the upper limit of the 95% interval? Give your answer to three decimal places. Which of the following assumptions should be checked before constructing the above confidence interval?
The times for 300 college students of introductory statistics to complete a one-hour times exam.
suppose that x is a continuous random variable with a probability distribution fx 2x25 where x is between 0 and 5
To investigate the fluid mechanics of swimming, twenty swimmers each swam a specified distance in a water-filled pool and in a pool where the water was thickened with food grade guar gum to create a syrup-like consistency. Velocity, in meters per sec..
Use the expected collision payment to determine the collision insurance premium that would enable the company to break even on the policy.
A coin was flipped 100 times and came up heads 59 times and tails 41 times. The expected outcome was to land on heads or tails 50 times each.
Should H0 be rejected? What should the researcher conclude and determine the 95% confidence interval for the population mean, based on the sample mean.
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
What internal and external threats are and could you provide some examples of what would be considered a threat to internal and/or external validity of a study design.
From National Weather Service records, the annual snowfall in the TopKick Mountains has a mean of 92 inches and a standard deviation ? of 12 inches.
The null hypothesis is to be tested at 95% confidence. Determine the critical values for this test.
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